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17 Cards in this Set

  • Front
  • Back
What does PERIODIC mean?
regular, repeating pattern
Who was Dmirti Mendeleev?
Russian scientist who invented the Periodic Table of Elements to sort the known elements out in an orderly way.
What is the PERIODIC LAW?
The chemical and physical properties of elements are periodic functions of their atomic numbers.
What is the simplest elemtent?
Hydrogen hsa one proton and one electron with NO neutrons.
What are the columns on the periodic table called?
Groups have similar physical/chemical properties.
Rows in the Periodic table are called what?
Periods are arranged in patterns, more specifically in order from least amount of protons to most amount of protons.
What do groups one and two contain?
Very reactive metals easily ract with other elements in nature.
What are the elements in group one called?
Alkali metals are generally soft, silver-colored, shiny, and have low density.
What are the elements in group two called?
Alkaline-earth metals are generally silver-colored and can be used (with other elements) to make airplanes.
What are groups 3-12 called?
Transition metals are generally good conductors of heat and electricity, and have varying ractivity.
What are Lanthanides and Actinides?
the two groups placed below the Table to save roon
Describe the boron group.
group 13
one metalloid
four metals
3 electrons in outer level
Describe the carbon group.
group 14
one nonmetal
two metalloids
two metals
4 electrons in outer level
ractivity varies
Describe the nitrogen groups.
group 15
two nonmetals
two metalloids
one metal
5 electrons in outer level
reactivity varies
Describe the oxygen group.
group 16
three nonmetals
one metalloid
one metal
6 electrons in outer level
Describe the halogens group.
group 17
7 electrons in outer level
very reactive
What is so special about group 18? (the Noble Gasses)
The Noble Gasses are unreactive to other elements under normal conditions.